In today's wireless communication systems, the exponentially growing needs of mobile users require the combination of new and existing techniques to meet the demands for reliable and high-quality service provision. This may not always be possible, as the resources in wireless telecommunication systems are limited and a significant number of users, usually located at the cell edges, can suffer from severe interference. For this purpose, a new Joint Transmission Coordinated Multipoint (JT-CoMP) scheme, in which the transmission points' clustering is based on a coalition formation game, is deployed alongside with Non-Orthogonal Multiple Access (NOMA) in a Cloud Radio Access Network (C-RAN) consisting of small cells. To further enhance the network's performance, Multiuser Multiple-Input Multiple-Output (MU-MIMO) with Zero-Forcing (ZF) beamforming is applied. The proposed scheme's performance, in terms of user throughput, is then compared to that of a scheme where JT-CoMP with static clustering is selected, a JT-CoMP scheme with clustering based on a greedy algorithm and a scenario where JT-CoMP is not deployed. Simulation results confirm that the proposed scheme reliably improves the throughput of users with poor wireless channels while guaranteeing that the performance of the rest is not severely undermined.
翻译:在今天的无线通信系统中,移动用户需求急剧增长,需要结合新技术和现有技术,以满足可靠和高质量服务的提供需求。这可能并不总是可能的,因为无线电信系统的资源有限,而且大量用户(通常位于细胞边缘)可能受到严重干扰。为此,采用了一个新的联合传输协调多点(JT-CoMP)计划,在该计划中,传输点的集群以联盟组建游戏为基础,与由小细胞组成的云层无线电接入网(C-RAN)中的非正统多重接入(NOMA)一起部署。为了进一步提高网络的性能,可能并非总有可能做到。多用户多投入多产出(MU-MIMO)与Zero-Forning(ZF)相配成的多功能(JT-CoMP)计划(JT-CoMP)将传输点集中起来,与选择静态组合的JT-CoMP(NOMA)计划相比,这个计划基于贪婪的算法和设想方案,即JT-CoMP的用户在不可靠地改善无线路段计划的同时,不可靠地证实无损的无线段运行计划。